finish v3.4.9 changelog - closes #541 [skip ci]
finish v3.4.9 changelog - closes #541 [skip ci]

CartoDB/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik